package org.example;
import java.util.Scanner;
import static java.lang.Math.max;
public class max {
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int[] nums = new int[n];
        for (int i=0;i<n;i++)
            nums[i] = scanner.nextInt();
        int mx = nums[0],s = 0;
        for (int i=0;i<n;i++){
            s = max(s+nums[i],nums[i]);
            mx = max(mx,s);
        }
        System.out.println(mx);
    }
}